Select Booking Settings from the Account dropdown menu
Select Tables from the Booking Settings submenu
Locate the Table Joins section shown below
Select the area for the Table Join in the Area dropdown
Enter the tables in the Table Join in the Join Listfield using commas. Example: Table Join for tables 1 and 2 and 3 will result in a table join called 1,2,3
Enter the Total Seats (Min) and Total Seats (Max) available in the joined tables Note: Name and Priority are optional. See - How does table priority work